Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9915761 | Optical system having optical thin film including amorphous silicon oxide-based binder | Hitoshi Ishizawa, Tsuyoshi Murata | 2018-03-13 |
| 8098432 | Optical multi-layer thin film, optical element, and method for producing the optical multi-layer thin film | Hitoshi Ishizawa | 2012-01-17 |
| 6831731 | Projection optical system and an exposure apparatus with the projection optical system | Yasuhiro Omura, Naomasa Shiraishi, Issey Tanaka, Soichi Owa, Toshihiko Ozawa | 2004-12-14 |